The renewable natural gas (RNG) pricing and regulatory landscape may still be filled with mystery, as displayed in the first quarter, but utilities and producers have continued to push for the biofuel’s growth, insisting it would play an active role in energy for years to come. 

In March, 116 million gasoline gallon equivalents (GGE) of renewable identification number (RIN) credits were produced from renewable compressed natural gas and liquefied natural gas, according to NGI’s Josten Mavez, senior analyst. This marks “a 19% increase during the same period last year,” and represents roughly 4% of total natural gas supplies. 

CEO Andrew Littlefair of Clean Energy Fuels Corp. (CLNE), which distributes most of its RNG via third-party contracts, told investors recently that...